Looking at publicly available hearing transcripts and videos, Paul's attendance at the full committee and subcommittees he is on was only verifiable at 15 of 94 hearings since 2014. Out of the 94 hearings since 2014, 12 of them were closed, and Paul's attendance could not be verified either way.

Previously, BuzzFeed News found Paul had only attended five out of 73 Homeland Security hearings since 2014.

The senator, who launched his presidential campaign several weeks ago in his home state, calls national security and foreign policy "one of the primary functions of the Federal Government" on his issues page.

A Paul aide said "Senator Paul is one of the most active members of the U.S. Senate. In that same timeframe, he has made more than 98 percent of the votes in the Senate and authored more than 50 bills and amendments, all the while maintaining a full schedule of meetings with Kentuckians in his office."

"When schedules conflict, he has chosen to spend his time hearing the thoughts of Kentuckians, and will subsequently, receive a full report of pertinent information that was missed from staff in attendance at the meeting."

Politicorecently reported one of Paul's presidential rivals, Sen. Ted Cruz of Texas, has skipped most Armed Services hearings since coming to Washington in 2012 and his committee attendance at other hearings was sub-par.

In the 2014 midterms elections, committee attendance became an in issue in the North Carolina Senate race when current Sen. Thom Tillis of North Carolina blasted then-Sen. Kay Hagan for missing "half the Armed Services Committee hearings" in 2014. Sen. John McCain blasted Hagan as well for missing a hearing on ISIS for a fundraiser in New York.

Paul skipped a hearing on the nomination of three ambassadors. Later that day, Paul filmed a segment for On the Record where he discussed Obama making recess appointments.

Later that month, on the night of the State of the Union, Paul skipped the hearing on the nomination of Max Baucus to be ambassador to China. Paul went on CNN and Fox News later that day to discuss Obama's speech to the nation.

Later that month, Paul missed a business hearing for Foreign Relations (but voted by proxy). He also missed a subcommittee hearing on international energy that discussed Ukraine. Later that evening, he went on Fox News to discuss Russia and Ukraine.

Paul also missed a nomination hearing that month for 7 ambassadors. He went on PBS that same day to discuss criminal justice reform. He did attend a meeting on Iran negotiations that day.

In September, Paul skipped a hearing on four ambassador nominations, including two to the Middle East. That evening he went on Fox News to discuss the Islamic State. He likewise missed a nominations hearing a week later and appeared on Hannity again. Paul did attend a hearing that day on ISIS.

In November, Paul skipped the nomination hearing for Tony Blinken, the deputy White House national security advisor, to be a deputy secretary of state. Later that evening, he was on Fox News discussing immigration and executive action.

In early December, Paul missed a nomination hearing. That evening he went on Fox News to discuss executive action.

Several days later, Paul missed a business meeting that discussed vaccines, Burma, and Hamas. He later appeared on Hardball where he discussed foreign defense and on CNN where he discussed Eric Garner's death.